Sodium bicarbonate (NaHCO? , an inorganic compound, is a white crystalline powder, odorless, salty and soluble in water. It decomposes slowly in humid air or hot air to produce carbon dioxide, which is completely decomposed when heated to 270℃. In case of acid, it is strongly decomposed to produce carbon dioxide.
Sodium bicarbonate is widely used in analytical chemistry, inorganic synthesis, industrial production, agriculture and animal husbandry.
Industrial use
Sodium bicarbonate can be used to produce acid-base fire extinguishers and foam extinguisher, and it can be used to produce rubber and sponge in rubber industry. Sodium bicarbonate can be used as a flux for casting steel ingots in metallurgical industry. In the mechanical industry, sodium bicarbonate can be used as a molding aid for cast steel sand molds.
In printing and dyeing industry, sodium bicarbonate can be used as fixing agent, acid-base buffer and post-treatment agent for fabric dyeing and finishing. Adding baking soda in dyeing can prevent the yarn tube from producing colored flowers and can also be used as a detergent for wool.
Food processing use
In food processing, sodium bicarbonate is the most widely used loosening agent, which is used to produce biscuits, bread, etc., but sodium carbonate will remain after the action. Too much use will make the food too alkaline, which will lead to poor flavor and yellow-brown color.
It is the generator of carbon dioxide in soft drinks; It can be compounded with alum to form alkaline baking powder, and can also be compounded with soda ash to form civil caustic soda; It can also be used as a butter preservative. It can be used as color fixative for fruits and vegetables in vegetable processing.
Adding about 0. 1%~0.2% sodium bicarbonate when washing fruits and vegetables can make it green and stable. When sodium bicarbonate is used as a treatment agent for fruits and vegetables, the pH value of fruits and vegetables can be increased, the water holding capacity of protein can be improved, the food tissue cells can be softened, and the astringent components can be dissolved. In addition, it can remove the smell of goat milk, and the dosage is 0.00 1%~0.002%.
The above contents refer to Baidu Encyclopedia-Sodium Bicarbonate.